Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . he laboratory. The cylinder goes by clockwork, which is wound by turning the button at theend. In order to stop the cylinder, one blows into the rubber tube marked with anarrow. To start it again one draws the air out of the tube. To render the cylinderfree to revolve, the button to the loft is turned to the left. This is necessary tosmoke the paper on the cylinder. To conn
Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . he laboratory. The cylinder goes by clockwork, which is wound by turning the button at theend. In order to stop the cylinder, one blows into the rubber tube marked with anarrow. To start it again one draws the air out of the tube. To render the cylinderfree to revolve, the button to the loft is turned to the left. This is necessary tosmoke the paper on the cylinder. To connect with the clockwork again the buttonis turned to the right. The maker is Verdin, of Paris. The small polygraph (fig. 3.) is a French instrument. The cylinder can be madetu revolve, varying at the rate of once in five seconds to once in thirty seconds. See list of instrument makers at end of this chapter. 2 Marey, Circulation du sang, 2e edition, page 342. 3 See pages 171-172. 166 MAN AND ABNORMAL MAN. Different speeds can be obtained by changing the position of the wings (a) of theregulator. The one in the laboratory of this bureau has been made portable byhaving a case made for it. The maker is Verdin, of Fig. 3.—Small The standard instrument for measuring time relations is the Hipp-Chronoscope(fig. 4). It consists of clockwork moved by a weight. There are two dials, the hands of which can be thrown in and out ofgear. Either a glass or a wooden case coversthe clockwork. This instrument measuresto thousandths of a second. In using thisinstrument, electric keys, commutators, bat-teries, testing apparatus, etc., are , Krille, Leipzig. THE VERNIER CHRONOSCOPE. The essential part of the instrument is thepair of unequal pendulums at the left. Thelonger of these is of such a length as to makeone complete swing (i. e., to traverse its arcand return to the same point) in sec-onds; the shorter makes a complete swingin seco
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